题解 | #定义打印方法#

import java.util.Scanner;

public class Main {

    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNext()) {
            String className = scanner.next();
            // print就是需要你定义的方法
            print(Class.forName(className).newInstance());
        }
    }
public static void print(Object obj){//这个方法在Main类里，静态static-main方法调用print成员方法，print也需要为static。
    System.out.print(obj.toString());
}
    //write your code here......
    

}

class First {
    public String toString() {
        return "First";
    }
}

class Second {
    public String toString() {
        return "Second";
    }
}

class Third {
    public String toString() {
        return "Third";
    }
}